According to Us Weekly, the pair were introduced by friends and have started dating. Like her sister Mary-Kate, who is dating 44-year-old Olivier Sarkozy, there is an age gap between Ashley and her new man - Miller is 20 years older.

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The pair have been seen dining in West Hollywood, and are rumoured to have spent time together whilst Miller was filming his latest project, Foxcatcher in LA.

The fashion designer, who split with businessman David Schulte at the beginning of this year, was spotted with Miller at the funeral of Philip Seymour Hoffman. Miller, who directed the film Capote which Hoffman starred in and won an Oscar for, was a close friend of the late actor.